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Flauer [41]
3 years ago
9

What method would you choose to solve the equation 2x2 – 7 = 9? Explain why you chose this method.

Mathematics
2 answers:
Illusion [34]3 years ago
7 0
Normal solution;
By taking -7 to the RHS, you will have 
2 x^{2} =16
dividing both sides by 2 gives;
x^{2} =8
x= \sqrt{8} 
x=2 \sqrt{2}
Kisachek [45]3 years ago
5 0
<span>This is a quadratic equation . We order to equate to zero

</span>2x²<span> – 7 = 9  
 </span>
2x² - 7-9 = 0
2x² - 16 = 0

This equation is a binomial
2* (x² - 8) = 0
<span>We choose the simplest method . The equation with practice it can be calculated in the memory
</span><span>
The product is equal to 0 if one of the factors is zero
</span>
2≠0  ∨     x² - 8 = 0
               x² = √8
               x = √8     ∨  x= - √8

Answer : x = √8 ∨ x = -√8
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<em>Hi there !</em>

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